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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.midiscope;
import android.app.ActionBar;
import android.app.Activity;
import android.media.midi.MidiDeviceInfo;
import android.media.midi.MidiManager;
import android.media.midi.MidiReceiver;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toolbar;
import com.example.android.common.midi.MidiFramer;
import com.example.android.common.midi.MidiOutputPortSelector;
import com.example.android.common.midi.MidiPortWrapper;
import java.util.LinkedList;
/**
* App that provides a MIDI echo service.
*/
public class MainActivity extends Activity implements ScopeLogger {
private static final int MAX_LINES = 100;
private final LinkedList<String> mLogLines = new LinkedList<>();
private TextView mLog;
private ScrollView mScroller;
private MidiOutputPortSelector mLogSenderSelector;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setActionBar((Toolbar) findViewById(R.id.toolbar));
ActionBar actionBar = getActionBar();
if (actionBar != null) {
actionBar.setDisplayShowTitleEnabled(false);
}
mLog = (TextView) findViewById(R.id.log);
mScroller = (ScrollView) findViewById(R.id.scroll);
// Setup MIDI
MidiManager midiManager = (MidiManager) getSystemService(MIDI_SERVICE);
// Receiver that prints the messages.
MidiReceiver loggingReceiver = new LoggingReceiver(this);
// Receiver that parses raw data into complete messages.
MidiFramer connectFramer = new MidiFramer(loggingReceiver);
// Setup a menu to select an input source.
mLogSenderSelector = new MidiOutputPortSelector(midiManager, this, R.id.spinner_senders) {
@Override
public void onPortSelected(final MidiPortWrapper wrapper) {
super.onPortSelected(wrapper);
if (wrapper != null) {
mLogLines.clear();
MidiDeviceInfo deviceInfo = wrapper.getDeviceInfo();
if (deviceInfo == null) {
log(getString(R.string.header_text));
} else {
log(MidiPrinter.formatDeviceInfo(deviceInfo));
}
}
}
};
mLogSenderSelector.getSender().connect(connectFramer);
// Tell the virtual device to log its messages here..
MidiScope.setScopeLogger(this);
}
@Override
public void onDestroy() {
mLogSenderSelector.onClose();
// The scope will live on as a service so we need to tell it to stop
// writing log messages to this Activity.
MidiScope.setScopeLogger(null);
super.onDestroy();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
setKeepScreenOn(menu.findItem(R.id.action_keep_screen_on).isChecked());
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_clear_all:
mLogLines.clear();
logOnUiThread("");
break;
case R.id.action_keep_screen_on:
boolean checked = !item.isChecked();
setKeepScreenOn(checked);
item.setChecked(checked);
break;
}
return super.onOptionsItemSelected(item);
}
private void setKeepScreenOn(boolean keepScreenOn) {
if (keepScreenOn) {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
} else {
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
}
@Override
public void log(final String string) {
runOnUiThread(new Runnable() {
@Override
public void run() {
logOnUiThread(string);
}
});
}
/**
* Logs a message to our TextView. This needs to be called from the UI thread.
*/
private void logOnUiThread(String s) {
mLogLines.add(s);
if (mLogLines.size() > MAX_LINES) {
mLogLines.removeFirst();
}
// Render line buffer to one String.
StringBuilder sb = new StringBuilder();
for (String line : mLogLines) {
sb.append(line).append('\n');
}
mLog.setText(sb.toString());
mScroller.fullScroll(View.FOCUS_DOWN);
}
}
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